Keystones — Cornerstone
Five GCSE retrieval questions · 13 April 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 83 + 91
Answer: 83 + 91 = 174 -
2. Algebra
Expand: 6(3x + 9)
Answer: 18x + 54 -
3. Geometry
Opposite = 7cm, hypotenuse = 8.cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify: 9:6:15
Answer: 3:2:5 -
5. Statistics
Find the mean of: 20, 9, 4, 3, 14
Answer: 10